How to know the butterflies
Subtitle: a manual of the butterflies of the eastern United States
By: by John Henry Comstock and Anna Botsford Comstock.
Contributors: Comstock, Anna Botsford, 1854-1930.
Publisher: Comstock Pub.
Published: 1920
Place of publication: Ithaca, N.Y. :New York
Language: eng
Number of pages: 311
Subjects: Butterflies -- United States -- Identification.
Genres: Identification.
Notes: Includes index.